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Chen L, Liu N, Zhang M, Li C, Wu K, Qin J, Zhao Q, Song J, Liu J, Ye Z. Preparation of chitosan resin by two-step crosslinking method and its adsorption for palladium in wastewater. Int J Biol Macromol 2024; 278:134766. [PMID: 39151858 DOI: 10.1016/j.ijbiomac.2024.134766] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2024] [Revised: 08/01/2024] [Accepted: 08/13/2024] [Indexed: 08/19/2024]
Abstract
To preserve the activity of amine groups on chitosan, chitosan resin (CR) was synthesized using the reversed-phase suspension two-step crosslinking method for the adsorption of palladium from wastewater. The effects of varying the amounts of chitosan, liquid paraffin, ethyl acetate, formaldehyde solution, and epichlorohydrin on the adsorption capacity of CR were investigated using both single-factor experiments and response surface methodology. The preparation conditions for the chitosan resin were optimized, and its adsorption properties were systematically evaluated. The results indicated that CR exhibited a high saturated adsorption capacity for palladium, reaching 195.22 mg·g-1. The adsorption kinetics followed the pseudo-second-order model, while the adsorption isotherms were well described by the Sips model. Thermodynamic analysis demonstrated that the adsorption process was spontaneous and endothermic. Furthermore, CR maintained exceptional stability, with a palladium removal efficiency exceeding 99.8 % even after eight adsorption-desorption cycles. The primary adsorption mechanism is attributed to the interaction between palladium ions and the protonated amino groups of the chitosan resin.
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Affiliation(s)
- Liuzhou Chen
- Department of Environmental Engineering, Peking University, The Key Laboratory of Water and Sediment Sciences, Ministry of Education, Beijing 100871, China
| | - Nengsheng Liu
- Department of Environmental Engineering, Peking University, The Key Laboratory of Water and Sediment Sciences, Ministry of Education, Beijing 100871, China
| | - Mohe Zhang
- School of Materials Science & Engineering, Beijing Institute of Technology, Beijing 100081, China; Ordnance Science and Research Academy of China, Beijing 100089, China
| | - Chenxi Li
- Department of Environmental Engineering, Peking University, The Key Laboratory of Water and Sediment Sciences, Ministry of Education, Beijing 100871, China
| | - Kun Wu
- Department of Environmental Engineering, Peking University, The Key Laboratory of Water and Sediment Sciences, Ministry of Education, Beijing 100871, China
| | - Jiangzhou Qin
- Department of Environmental Engineering, Peking University, The Key Laboratory of Water and Sediment Sciences, Ministry of Education, Beijing 100871, China
| | - Quanlin Zhao
- Department of Environmental Engineering, Peking University, The Key Laboratory of Water and Sediment Sciences, Ministry of Education, Beijing 100871, China
| | - Jianwei Song
- Qingyang Chemical Industry Corporation, Liaoyang 111001, China
| | - Jinxin Liu
- Qingyang Chemical Industry Corporation, Liaoyang 111001, China
| | - Zhengfang Ye
- Department of Environmental Engineering, Peking University, The Key Laboratory of Water and Sediment Sciences, Ministry of Education, Beijing 100871, China.
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2
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Wang G, Feng N, Wu H, Liu Y, Jin Y, Kang X, Hu T, Zhao X, Xu G, Liu H, Xie J. Sedimentable polyethyleneimine-modified yeast residue enhances the selective adsorption of Pd(II) by altering isoelectric point. J Mol Liq 2023. [DOI: 10.1016/j.molliq.2023.121529] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/03/2023]
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3
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Khan M, Al-Ghouti MA, Khraisheh M, Shomar B, Hijji Y, Tong Y, Mansour S, Nasser MS. Synthesis of nanostructured novel ion-imprinted polymer for selective removal of Cu 2+ and Sr 2+ ions from reverse osmosis concentrated brine. ENVIRONMENTAL RESEARCH 2023; 231:116024. [PMID: 37121345 DOI: 10.1016/j.envres.2023.116024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2022] [Revised: 04/15/2023] [Accepted: 04/28/2023] [Indexed: 05/09/2023]
Abstract
This study aims to prepare an ion-imprinted polymer (IIP) using copper sulfate as a template and potassium persulfate as an initiator to selectively adsorb copper ions (Cu2+) from aqueous solutions and in an attempt to also test its applicability for removing strontium ions (Sr2+). The prepared polymer was denoted by IIP-Cu. Various physical and chemical characterizations were performed for the prepared IIP-Cu. The scanning electron microscopy and transmission electron microscopy analyses confirmed the cavities formed after the removal of the template. It also indicated that the IIP-Cu had a rough and porous topology. The X-ray photoelectron spectroscopy confirmed the successful removal of the Cu template from IIP-Cu. The Brunauer-Emmet-Teller revealed that the surface area of IIP-Cu is as high as 152.3 m2/g while the pore radius is 8.51 nm. The effect of pH indicated that the maximum adsorption of Cu2+ was achieved at pH 8 with 98.7%. Isotherm studies revealed that the adsorption of Cu2+ was best explained using Langmuir models with a maximum adsorption capacity of 159 mg/g. The effect of temperature revealed that an increase in temperature had an adverse impact on Cu2+ removal from the aqueous solution, which was further confirmed by thermodynamic studies. The negative value of standard enthalpy change (-4.641 kJ/mol) revealed that the adsorption of Cu2+ onto IIP-Cu was exothermic. While the continuous increase in Gibbs free energy from -6776 kJ/mol to -8385 kJ/mol with the increase in temperature indicated that the adsorption process was spontaneous and feasible. Lastly, the positive value of the standard entropy change (0.023 J/mol.K) suggested that the Cu2+ adsorption onto IIP-Cu had a good affinity at the solid-liquid surface. The efficiency of the prepared IIP-Cu was also tested by studying the adsorption capacity using Sr2+ and real brine water. The results revealed that IIP-Cu was able to remove 63.57% of Sr2+ at pH 8. While the adsorption studies revealed that the experiment was best described using the Langmuir model with a maximum adsorption capacity of 76.92 mg/g. Additionally, IIP-Cu was applied in a real brine sample, which consisted of various metal ions. The highest percentage of Cu2+ removal was 90.6% and the lowest was 65.63% in 1:4 and 1:1 brine ratios, respectively. However, this study indicates the successful application of IIP-Cu in a real sample when it comes to the effective and efficient removal of Cu2+ in a solution consisting of various competing ions.
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Affiliation(s)
- Mariam Khan
- Environmental Science Program, Department of Biological and Environmental Sciences, College of Arts and Sciences, Qatar University, Doha, P.O. Box: 2713, Qatar
| | - Mohammad A Al-Ghouti
- Environmental Science Program, Department of Biological and Environmental Sciences, College of Arts and Sciences, Qatar University, Doha, P.O. Box: 2713, Qatar.
| | - Majeda Khraisheh
- Department of Chemical Engineering, College of Engineering, Qatar University, Doha, P.O. Box: 2713, Qatar
| | - Basem Shomar
- Environmental Science Center, Qatar University, Doha, P.O. Box: 2713, Qatar
| | - Yousef Hijji
- Environmental Science Program, Department of Biological and Environmental Sciences, College of Arts and Sciences, Qatar University, Doha, P.O. Box: 2713, Qatar
| | - Yongfeng Tong
- Core Labs, Qatar Environment and Energy Research Institute (QEERI), Hamad Bin Khalifa University (HBKU) 34110 Qatar Foundation, Doha, Qatar
| | - Said Mansour
- Core Labs, Qatar Environment and Energy Research Institute (QEERI), Hamad Bin Khalifa University (HBKU) 34110 Qatar Foundation, Doha, Qatar
| | - Mustafa Saleh Nasser
- Gas Processing Center, College of Engineering, Qatar University, Doha, P.O. Box 2713, Qatar
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4
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Wang C, Zhang L, Zhou G, Qiu J, Liu Y, Yang R, Chi J, Wang J. Synthesis of environmental-friendly ion-imprinted magnetic nanocomposite bentonite for selective recovery of aqueous Sc(III). J Colloid Interface Sci 2023; 630:738-750. [DOI: 10.1016/j.jcis.2022.10.161] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2022] [Revised: 10/24/2022] [Accepted: 10/30/2022] [Indexed: 11/06/2022]
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5
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Selective adsorption of palladium ions from wastewater by ion-imprinted MIL-101(Cr) derived from waste polyethylene terephthalate: Isotherms and Kinetics. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.122767] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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6
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Zhang X, Chen Z, Wan Z, Liu C, He R, Xie X, Huang Z. Selective Recovery of Palladium (II) from Metallurgical Wastewater Using Thiadiazole-Based Chloromethyl Polystyrene-Modified Adsorbent. Int J Mol Sci 2022; 23:12158. [PMID: 36293033 PMCID: PMC9603776 DOI: 10.3390/ijms232012158] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2022] [Revised: 10/04/2022] [Accepted: 10/09/2022] [Indexed: 09/07/2024] Open
Abstract
Selective adsorption of palladium from metallurgical wastewater containing Pt (IV), Rh (III), Ca2+, Cu2+, Fe3+, Ni2+, Pb2+, V3+, and Ti4+ has tremendous economic and environmental benefits. In this paper, a novel thiadiazole-based chloromethyl polystyrene-modified adsorbent, viz. 2, 5-bis-polystyrene-1,3,4-thiadiazole (PS-DMTD), was synthesized using chloromethyl polystyrene as the backbone. The experimental results show that PS-DMTD can selectively separate Pd (II) from metallurgical wastewater in a one-step adsorption process. The calculated saturation adsorption capacity of PS-DMTD for Pd (II) was 176.3 mg/g at 25 °C. The separation factors of βPd (II)/Mn+ (Mn+: Pt (IV), Rh (III), Ca2+, Cu2+, Fe3+, Ni2+, Pb2+, V3+, and Ti4+) were all higher than 1 × 104. FT-IR, XPS, and single-crystal X-ray diffraction showed that the adsorption of Pd (II) to PS-DMTD was primarily through a coordination mechanism. Density functional theory (DFT) calculations revealed that the other base metal ions could not coordinate with the PS-DMTD. Pt (IV) could not be adsorbed to PS-DMTD due to its strong chlorophilicity. Furthermore, Rh (III) existed as a polyhydrate, which inhibited Rh (III) diffusion toward the positively charged absorption sites on the PS-DMTD. These results highlight that PS-DMTD has broad application prospects in the recovery of Pd (II) from metallurgical wastewater.
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Affiliation(s)
| | | | | | | | | | - Xiaoguang Xie
- School of Chemical Science and Technology, Yunnan University, Kunming 650091, China
| | - Zhangjie Huang
- School of Chemical Science and Technology, Yunnan University, Kunming 650091, China
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7
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Gao Y, Zhou RY, Yao L, Wang Y, Yue Q, Yu L, Yu JX, Yin W. Selective capture of Pd(II) from aqueous media by ion-imprinted dendritic mesoporous silica nanoparticles and re-utilization of the spent adsorbent for Suzuki reaction in water. JOURNAL OF HAZARDOUS MATERIALS 2022; 436:129249. [PMID: 35739768 DOI: 10.1016/j.jhazmat.2022.129249] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2022] [Revised: 05/07/2022] [Accepted: 05/25/2022] [Indexed: 06/15/2023]
Abstract
The development of highly efficient adsorptive material for the selective capture of Pd(II), and re-utilization of spent Pd(II)-loaded adsorbent as an efficient catalyst for organic synthesis are of great significance, but challenging. Particularly, the heterogeneous palladium-catalyzed Suzuki reaction in aqueous media is much more challenging than that of homogeneous. Herein, several novel Pd(II) ion-imprinted polymers (PIIPs) based on dendritic fibrous silica particles are constructed by surface ion imprinting technology (SIIT), using Schiff base and pyridine groups functionalized organosilicon as functional monomer. The PIIP-3 prepared by 3 g of functional monomer exhibits the best adsorption performance, and shows ultrafast (10 min) and selective capture of Pd(II) with high uptake capacity (382.5 mg/g). Moreover, the waste Pd(II) loaded PIIP-3 (PIIP-3-Pd) can serve as a catalyst towards the Suzuki reaction in water, affording 94.2 % yield of the desired product. Interestingly, the PIIP-3-Pd can be reused 12 times without an appreciable decrease in catalytic activity, which is probably due to the imprinted cavity and specific recognition site of PIIP-3 can match and recapture Pd active species in a complex catalytic environment. Thus, this work demonstrates huge potentials of SIIT to enhance the selectivity of adsorption process and increase the lifetime of catalysts.
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Affiliation(s)
- Yue Gao
- Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao 266000, China
| | - Ru-Yi Zhou
- Hubei Key Laboratory of Biomass Fibers and Eco-dyeing & Finishing, School of Chemistry and Chemical Engineering, Wuhan Textile University, Wuhan 430073, China; Hubei key Laboratory of Novel Reactor & Green Chemical Technology, National Engineering Research Center of Phosphorus Resource Exploitation, School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan 430074, China
| | - Lifeng Yao
- School of Chemistry and Chemical Engineering, Jiangxi Science and Technology Normal University, Nanchang 330013, China
| | - Yi Wang
- Hubei Key Laboratory of Biomass Fibers and Eco-dyeing & Finishing, School of Chemistry and Chemical Engineering, Wuhan Textile University, Wuhan 430073, China; Hubei key Laboratory of Novel Reactor & Green Chemical Technology, National Engineering Research Center of Phosphorus Resource Exploitation, School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan 430074, China
| | - Qinyan Yue
- Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao 266000, China
| | - Lan Yu
- Hubei Key Laboratory of Biomass Fibers and Eco-dyeing & Finishing, School of Chemistry and Chemical Engineering, Wuhan Textile University, Wuhan 430073, China
| | - Jun-Xia Yu
- Hubei key Laboratory of Novel Reactor & Green Chemical Technology, National Engineering Research Center of Phosphorus Resource Exploitation, School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan 430074, China.
| | - Weiyan Yin
- Hubei Key Laboratory of Biomass Fibers and Eco-dyeing & Finishing, School of Chemistry and Chemical Engineering, Wuhan Textile University, Wuhan 430073, China.
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Ma X, Men J, Gao T, Liu W, Wang X, Lou T. Electrospinning nanofibrous sodium alginate/β‐cyclodextrin composite membranes for methylene blue adsorption. STARCH-STARKE 2022. [DOI: 10.1002/star.202200068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Xiaolong Ma
- Department of Chemical Engineering Qingdao University Qingdao 266071 China
| | - Jinxin Men
- Department of Chemical Engineering Qingdao University Qingdao 266071 China
| | - Tong Gao
- Department of Chemical Engineering Qingdao University Qingdao 266071 China
| | - Wenxia Liu
- Department of Chemical Engineering Qingdao University Qingdao 266071 China
| | - Xuejun Wang
- Department of Chemical Engineering Qingdao University Qingdao 266071 China
| | - Tao Lou
- Department of Chemical Engineering Qingdao University Qingdao 266071 China
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9
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Pei X, Zheng X, Liu X, Lei A, Zhang L, Yin X. Facile fabrication of highly dispersed Pd catalyst on nanoporous chitosan and its application in environmental catalysis. Carbohydr Polym 2022; 286:119313. [PMID: 35337519 DOI: 10.1016/j.carbpol.2022.119313] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2021] [Revised: 03/01/2022] [Accepted: 03/01/2022] [Indexed: 12/01/2022]
Abstract
With the development of society, the problem of environmental pollution is becoming increasingly serious, such as the typical pollution of nitro compounds or dyes in wastewater. An effective strategy to remove these organic pollutants is catalytic conversion, including converting them into more chemically valuable compounds. Herein, a nanoporous chitosan microsphere derived from seafood waste resources of chitin was constructed via sol-gel method, which was used as supports to successfully fabricate a highly dispersed Pd nano-catalyst (mean diameter ~ 1.8 nm) via a facile way based on its interconnected nanoporous structure and rich functional -OH/-NH2 groups. The synthetic catalyst was applied to the hydrogenation of toxic nitro compounds, which could efficiently and selectively catalyze the conversion of nitro compounds. The catalyst was also used for the degradation of some representative dyes, which also showed good activity and stability, suggesting potential of applications in green environmental governance.
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Affiliation(s)
- Xianglin Pei
- School of Materials and Architectural Engineering, Guizhou Normal University, Guiyang 550025, China; College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China
| | - Xingli Zheng
- School of Materials and Architectural Engineering, Guizhou Normal University, Guiyang 550025, China; College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China
| | - Xinyun Liu
- School of Pharmaceutical Sciences, Guizhou Medical University, Guiyang 550025, China
| | - Aiwen Lei
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China
| | - Lina Zhang
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China
| | - Xiaogang Yin
- School of Materials and Architectural Engineering, Guizhou Normal University, Guiyang 550025, China.
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10
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Deng A, Wu S, Hao J, Pan H, Li M, Gao X. Photocatalytic Removal of Cr(VI) by Thiourea Modified Sodium Alginate/Biochar Composite Gel. Gels 2022; 8:293. [PMID: 35621591 PMCID: PMC9141709 DOI: 10.3390/gels8050293] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2022] [Revised: 04/28/2022] [Accepted: 05/06/2022] [Indexed: 02/04/2023] Open
Abstract
Heavy metal pollution is an important problem in current water treatments. Traditional methods for treating chromium-containing wastewater have limitations such as having complicated processes and causing secondary pollution. Therefore, seeking efficient and fast processing methods is an important research topic at present. Photocatalysis is an efficient method to remove Cr(VI) from aqueous solutions; however, conventional photocatalysts suffer from a low metal absorption capacity, high investment cost, and slow desorption of trivalent chromium from the catalyst surface. In this study, a novel composite gel was synthesized by chemically modifying thiourea onto sodium alginate, which was then mixed with biochar. The composite gel (T-BSA) can effectively remove 99.98% of Cr(VI) in aqueous solution through synergistic adsorption and photocatalytic reduction under UV light irradiation. The removal mechanism of Cr(VI) was analyzed by FT-IR, FESEM, UV-DRS and XPS. The results show that under acidic conditions, the amino group introduced by chemical modification can be protonated to adsorb Cr(VI) through electrostatic interaction. In addition, the biochar as a functional material has a large specific surface area and pore structure, which can provide active sites for the adsorption of Cr(VI), while the photo-reduced Cr(III) is released into the solution through electrostatic repulsion, regenerating the adsorption sites, thereby improving the removal performance of Cr(VI). Biochar significantly intensifies the Cr(VI) removal performance by providing a porous structure and transferring electrons during photoreduction. This study demonstrates that polysaccharide-derived materials can serve as efficient photocatalysts for wastewater treatment.
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Affiliation(s)
- Aijun Deng
- Anhui Province Key Laboratory of Metallurgical Engineering & Resources Recycling, Anhui University of Technology, Maanshan 243002, China; (A.D.); (H.P.)
- School of Metallurgical Engineering, Anhui University of Technology, Maanshan 243032, China; (S.W.); (J.H.); (M.L.)
| | - Shaojie Wu
- School of Metallurgical Engineering, Anhui University of Technology, Maanshan 243032, China; (S.W.); (J.H.); (M.L.)
| | - Junjie Hao
- School of Metallurgical Engineering, Anhui University of Technology, Maanshan 243032, China; (S.W.); (J.H.); (M.L.)
| | - Hongbo Pan
- Anhui Province Key Laboratory of Metallurgical Engineering & Resources Recycling, Anhui University of Technology, Maanshan 243002, China; (A.D.); (H.P.)
| | - Mingyang Li
- School of Metallurgical Engineering, Anhui University of Technology, Maanshan 243032, China; (S.W.); (J.H.); (M.L.)
| | - Xiangpeng Gao
- Anhui Province Key Laboratory of Metallurgical Engineering & Resources Recycling, Anhui University of Technology, Maanshan 243002, China; (A.D.); (H.P.)
- School of Metallurgical Engineering, Anhui University of Technology, Maanshan 243032, China; (S.W.); (J.H.); (M.L.)
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11
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Lin H, Duan Y, Zhao B, Feng Q, Li M, Wei J, Zhu Y, Li M. Efficient Hg(II) removal to ppb level from water in wider pH based on poly-cyanoguanidine/graphene oxide: Preparation, behaviors, and mechanisms. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.128467] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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12
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Yu C, Li H, Ma H, Zhang L, Li Y, Lin Q. Characteristics and mechanism of Cu(II) adsorption on prepared calcium alginate/carboxymethyl cellulose@MnFe2O4. Polym Bull (Berl) 2022. [DOI: 10.1007/s00289-021-03555-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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13
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Guo C, Wu S, Gao X, Li M, Long H. Mechanistic study of Cr (VI) removal by modified alginate/GO composite via synergistic adsorption and photocatalytic reduction. Int J Biol Macromol 2021; 189:910-920. [PMID: 34478793 DOI: 10.1016/j.ijbiomac.2021.08.203] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2021] [Revised: 08/26/2021] [Accepted: 08/27/2021] [Indexed: 11/26/2022]
Abstract
A novel composite material was prepared by blending graphene oxide into polyethyleneimine grafted sodium alginate. The synthesized material was investigated as adsorbent and photocatalyst for the removal of hexavalent chromium (Cr (VI)) from aqueous solutions. The composite material has shown remarkable removal efficiency for Cr (VI) in high initial concentration solutions as the removal rate reached 86.16% and 99.92% for adsorption and photoreduction, respectively. We discovered experimentally that the adsorption was dominated via electrostatic interaction while the blending of GO could contribute in stimulating electrons for the photoreduction process. Moreover, the photoreduction can alter the surface charge of chromium species, thus electrostatic repulsion could regenerating the active sites of composite spontaneously. The conduction band energy was calculated as -2.04 eV, which proved that blending GO can narrow the bandgap of the composite material, thus enhance the light response and the photoreduction ability towards Cr (VI).
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Affiliation(s)
- Cheng Guo
- Key Laboratory of Metallurgical Emission Reduction & Resources Recycling, Anhui University of Technology, Ministry of Education, Maanshan, Anhui 243002, China; School of Metallurgical Engineering, Anhui University of Technology, Maanshan, Anhui 243032, China
| | - Shaojie Wu
- School of Metallurgical Engineering, Anhui University of Technology, Maanshan, Anhui 243032, China
| | - Xiangpeng Gao
- Key Laboratory of Metallurgical Emission Reduction & Resources Recycling, Anhui University of Technology, Ministry of Education, Maanshan, Anhui 243002, China; School of Metallurgical Engineering, Anhui University of Technology, Maanshan, Anhui 243032, China.
| | - Mingyang Li
- School of Metallurgical Engineering, Anhui University of Technology, Maanshan, Anhui 243032, China
| | - Hongming Long
- Key Laboratory of Metallurgical Emission Reduction & Resources Recycling, Anhui University of Technology, Ministry of Education, Maanshan, Anhui 243002, China; School of Metallurgical Engineering, Anhui University of Technology, Maanshan, Anhui 243032, China
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14
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Sun Y, Gu Y, Jiang Y. Adsorption behavior of a tri-functionalized imprinted resin with high selectivity for 5-sulfosalicylic acid: Batch experiments and DFT calculation. JOURNAL OF HAZARDOUS MATERIALS 2021; 412:125271. [PMID: 33548783 DOI: 10.1016/j.jhazmat.2021.125271] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Revised: 01/25/2021] [Accepted: 01/27/2021] [Indexed: 06/12/2023]
Abstract
The presence of aromatic compounds with multiple functional groups such as 5-sulfosalicylic acid (SSA) in water bodies is a threat to aquatic organisms and human health. Phenol (PH) with the -OH group, benzoic acid with -COOH and benzenesulfonic acid (BSA) with -SO3H can be considered as SSA structural unit. In this study, three functional monomers, namely, N-methylallylamine, diallylamine, and triallylamine, with strong affinity for PH, BA, and BSA, respectively, were selected from 16 monomers by using density functional theory (DFT). Molecularly imprinted resin (MIP-4) with tri-functional groups and excellent selectivity for SSA was synthesized using a macroporous polystyrene resin (NDA-1800) as the carrier. In binary systems, MIP-4 exhibited excellent imprinting effect and adsorption selectivity for SSA. X-ray spectroscopy data and DFT calculations illustrated that the adsorption of SSA on MIP-4 was mainly dependent on the strong electrostatic interaction between the protonated amine group on the resin and -SO3- of SSA, as well as, the hydrogen bond between the neutral amine group and -OH and -COOH of SSA; the order of the three functional groups in identification was -OH > -COOH > -SO3H. In addition, the adsorption performance of MIP-4 was retained after five adsorption-desorption cycles.
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Affiliation(s)
- Yue Sun
- Department of Municipal Engineering, School of Civil Engineering, Southeast University, Nanjing 210096, China.
| | - Yingpeng Gu
- Department of Municipal Engineering, School of Civil Engineering, Southeast University, Nanjing 210096, China
| | - Yu Jiang
- Department of Municipal Engineering, School of Civil Engineering, Southeast University, Nanjing 210096, China
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15
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Gao X, Guo C, Hao J, Zhao Z, Long H, Li M. Adsorption of heavy metal ions by sodium alginate based adsorbent-a review and new perspectives. Int J Biol Macromol 2020; 164:4423-4434. [DOI: 10.1016/j.ijbiomac.2020.09.046] [Citation(s) in RCA: 124] [Impact Index Per Article: 31.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2020] [Revised: 08/27/2020] [Accepted: 09/07/2020] [Indexed: 12/18/2022]
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